rcu+sched+kthread+timer+wakeup+didn+t+happen

2025-01-20 23:19:47

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linux RCU - 知乎

kthread timer wakeup didn't happen for 23804 jiffies! g7076 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 “23804”表示 kthread 的计时器在 23000 多个 jiffies 前过期。该行的其余部分具有类似于 kthread 饥饿情况的含义。此外,还会打印以下行: Possible timer handling issue on cpu=4 timer-softirq=1...
System hangs with rcu_sched CPU stall, hung task, and soft...

[ 94.691906] (detected by 3, t=60002 jiffies, g=20409, q=2556) [ 94.691911] rcu: All QSes seen, last rcu_sched kthread activity 59998 (4294762429-4294702431), jiffies_till_next_fqs=3, root ->qsmask 0x0 [ 94.691918] rcu: rcu_sched kthread timer wakeup didn't happen for 59995 ...
INFO: rcu_sched self-detected stall on CPU - lydstory - 博客园

0-...: (2 GPs behind) idle=ba3/2/0 softirq=57744173/57744175 fqs=792613 (t=915060 jiffies g=633773 c=633772 q=122002) Task dump for CPU 0: swapper/0 R running 0 0 0 0x00100004 Stack : 0000001d 00000000 00000000 81070b60 00000000 00000000 00000000 00000000 00000000 00000000 00000000 ...